Re: [foxboro] Send mail from Solaris through firewall
- From: "Lowell, Tim" <Tim.Lowell@xxxxxxxxxxxxxxxxxxxxxx>
- To: "foxboro@xxxxxxxxxxxxx" <foxboro@xxxxxxxxxxxxx>
- Date: Tue, 29 Mar 2016 16:42:56 -0500
Duc,
Do you know for sure that the new firewall allows traffic through port 25?
Did you try telnet (relay server) 25 to see if the connection goes through?
Tim Lowell | Invensys, a Division of Schneider Electric | United States
| Principal Project Application Engineer
Phone: +1 713 329 8437 | Cell: +1 210 439 5914
Email: tim.lowell@xxxxxxxxxxxxxxxxxxxxxx | Site: www.schneider-electric.com
| Address: 10900 Equity Drive, 77041 Houston (Equity Drive), Texas, United
States
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-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Duc M Do
Sent: Tuesday, March 29, 2016 4:36 PM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] Send mail from Solaris through firewall
​List,
I've spent a good part of three days banging my head against the (fire)wall on
this issue. Please help me before the blood soaks everything.
The situation: AW-D running Solaris 2.5.1 and sendmail 8.6, you know the
ancient version on the stock Sun boxes. I configured /etc/mail/sendmail.cf
years ago to send mail from this Sun box to the corporate e-mail and it's been
working all these years. Recently, we moved all these Sun boxes to behind a
fortified firewall, so fortified that even with a known relay mail server, I
have not been able to send mail to my desktop.
Previously, these are the only edits in my sendmail.cf (with sendmail.cf.orig
being the plain vanilla, stock sendmail.cf that came with the software
install), and it worked splendidly to send system status reports to my
corporate e-mail account:
04AW01# cd /etc/mail
04AW01# diff sendmail.cf.orig sendmail.cf
21c21
< Dj$w.$m
---
Dj04AW01.dowcorning.net
27,28c27,28
< DRmailhost
< CRmailhost
---
DR
CR
I searched the freelists.org archive and found an excellent write up by Sven
Audenaert (thanks, Sven!) from Sept 2006 (
//www.freelists.org/post/foxboro/foxboro-Sendmail-error,2). Following
Sven's procedure, I added the mail relay in the hosts file, also calling it
"mailhost", and edited sendmail.cf accordingly. But that's where my progress
stopped.
Here's what I try to accomplish:
04AW01 ---> mailhost ---> smtp.dowcorning.net
originating relay server SMTP server destination
My new sendmail.cf (with sendmail.cf.orig being the plain vanilla, stock
sendmail.cf that came with the software install):
04AW01# diff sendmail.cf.orig sendmail.cf
21c21
< Dj$w.$m
---
Dj04AW01.dowcorning.net
24c24
< DMether
---
DMmailhost
The most relevant part of sendmail.cf:
# my official hostname
Dj04AW01.dowcorning.net
# major relay mailer
DMmailhost
# major relay host
DRmailhost
CRmailhost
Yes, I stopped and started the sendmail daemon as needed after editing
sendmail.cf
When I try to run the test as in Sven's procedure, sendmail just hangs and
times out after 3 minutes or so.
Question: How do I specify the relay host in sendmail.cf to allow me to send
mail through it to the corporate mail server?
Thanks in advance for all the help. And I really need all the help at this
point.
Duc
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